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11 Cards in this Set
- Front
- Back
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Overloaded methods cannot change return types |
False Overloaded methods can change return types |
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overridden methods cannot change return types,except in the case of covariant returns |
True overridden methods cannot change return types,except in the case of covariant returns |
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For methods with primitive return types, any value that can be implicitlyconverted to the return type can be returned |
True For methods with primitive return types, any value that can be implicitlyconverted to the return type can be returned |
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Methods with an object reference return type cannot return a subtype |
False Methods with an object reference return type can return a subtype |
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A constructor is not always invoked when a new object is created. |
False A constructor is always invoked when a new object is created. |
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Every class, even an abstract class, has at least one constructor. |
True Every class, even an abstract class, has at least one constructor. |
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Instance members are accessible only after the super constructor runs. |
True Instance members are accessible only after the super constructor runs. |
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If your superclass does not have a no-arg constructor, you must create a constructor and insert a call to super() with arguments matching those of thesuperclass constructor. |
True If your superclass does not have a no-arg constructor, you must create a constructor and insert a call to super() with arguments matching those of thesuperclass constructor. |
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The first statement of every constructor must be a call either to this() (anoverloaded constructor) or to super(). |
True The first statement of every constructor must be a call either to this() (anoverloaded constructor) or to super(). |
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this() may appear at any place in a constructor. |
False may appear only as the first statement in a constructor. |
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Calls to this() and super() cannot be in the same constructor. You canhave one or the other, but never both |
True Calls to this() and super() cannot be in the same constructor. You canhave one or the other, but never both |
